Window-heater.



W. C. BURMEISTER & E. 4N.'SM0CK.y

W|ND 0W HEATER.

APPLICATION FILED JULY2I19I6.

1,243,703. Patented out. 23,1917'.

2 SHEETS--SHEET 2.

@f/M E! gi UNITED sTATEs PATENT oEFIoE.

WILLIAM C. BUBHEISTEB AND EDWIN N. SHOCK, OI' CHICAGO, ILLINOIS, ASSIGNOBS 0I' ONE-BALI' T0 SAID BUBMEISTEB AND 0NE HAL-F T0 SAID SHOCK.

WINDOW-HEATER.

Specification o! Letters Patent.

' Patented Oct. 23, 191 '7.

' Application led July 21, 1916. Serial No. 110,510.

To all lwhom it may concern: y

Be it known that we, WILLIAM C. Bun- MEIsTEn and EDWIN N. SMOCK, citizens of -the United States, and residents of Chiture, sleet, snow or ice, and thus preserve said window in a clear condition for observation by the driver.

A further objectof our .invention isl to.

provide ,a device by -means f of which the eat generated will be applied I' directly to thewindow to be heated 1n an eiiicient and economical manner, to provide a device which can be easily applied, which shall be adapted for direct contact with the glass of the window, by means of which heat shall be applied to the glass to be heated both by direct radiation and by conduction, and by means offwhich heat can be applied from a source of electrical euery. y

A further object of our invention is to provide a device of. the kind described which can be placed in position against the glass, when needed, or swung out of such position when not needed, which shall autoinner surface of a motormans window and mounted for movement toward f and away from the window, provided with a at con-- tacting face and means for causing said dat face to evenlvf contact wxth'the glass. A

, hicle.

Our invention also consists in the several features of construction and in the arran ements and combinations of parts where y We are enabled to attain the above-mentioned and other objects and all as hereinafter described and particularly pointed out in the appended claims.

Our invention will be more readily understood by reference to the accompanying drawings forming part of this specification and in which Figure -1-- is a vertical sectional View of our window-heating device as applied to a motor-mans window on an electric street car, or the like;

'Fig. -2- is a fragmentary horizontal sectional view` on the line 2*-2 of Fig. -1-;

Fi 3- is adetail vertical section on the line 3 3 of Fig. 2; p

Fig. V4- is a detail vertical section on the'line 4-4 of Fig. -1-;

y Fig-5 is a` fragmentary vertical section on the line 5-5 of Fig. 2-;

Fig. -6- is a fragmentary rear elevation of an automobile Wind shield showing the application of our invention thereto;

Fig. 7'- is a vertical section of a wind-., shield and one of our heating devices showing a different means of mounting same;

and

Fig. 8, is a fragmentary horizontal section on the line 8-8 of Fig. -1.

In said drawings 1 represents the motor mans Window of a street car or similar ve Above the Window and secured to the wall of the car We arrange a box 2, in which we mount our heating device, and in which this form of our device is adapted to be stored when not in use. The box has a hinged cover 3 and may, of course, belocked if desired.

This form of our device comprises an elongated closed sheet metal casing 4 provided with a fiat smooth surface 5 on one side for contact with the glass 1. Said flat side consists .of perforated sheet metal and its longitudinal edges are turned over forming grooves 6 for receiving outwardly engaging flanges 7 formed on the casing, and by means of which the perforated side is removably held in place. `v

Upon one end wall we mount an elongated incandescent lamp 8 connected with a source of supply of electricity for producing 4the y heat which we utilize in heating the window. We preferably form the casing with a rounded or cylindrical back which serves to reiect the heat which strikes same toward the front of the casing. Some of the heat produced. by the lamp 8 is impinged directly against the glass through the perforations in the front plate 5 and some directly against the solid parts of the plate, furthermore the whole casing is more or le heated by the lamps and as the perforated front is in close metallic contact with the mainpart of the casing the heat passes to the front by conduction, as naturally the front is continually cooled faster than the body of the casing by reason of its contact with the glass.

For holding the casing in place we mount the casing on a swinging arm 9 connecting thev arm to the casing at the rear side and midway between its ends, by means of a universal joint connection 10, so that when the casing is pressed against the glass it will automatically accommodate itself to any slight lack of proper alinement and be set into fiat and firm contact with the glass throughout the area of its contacting surface.

The arm 9 is hollow and serves as a conduit for the electric wires 10l for entering the casing. The 'arm 9 is rigidly mounted at its opposite end on a horizontal ivot or shaft 11 carried in suitable lfixed rackets or bearings 12. i The arm swing up and down on said shaft 11 from operative position, shown in full lines, Fig. -1-, to the inoperative position shown in dotted lines. For the purpose of holding the arm with the casing in its two positions we provide an arm 13 secured to one end of the shaft 11, the free end of the arm being connected to one end of a tension spring 14, the opposite end of the spring 14 being secured 4to one wall of the box 2. The relations of' said spring 14, arm .13 and main arm 9 are such that'the spring holds the 'casing against the glass with a yielding pressure and also when the casing is within the box holds the device in non-rattling condition.

The universal joint 10 comprises a hollow ball-.like member 15 rigid with the casing,

anda spherical shell 16 formed on the'end of the arm 9.- The lshell 16 and arm 9 are split as shown to permit the ball 15 to be enticularl croaching upon that portion of the glass through which the motor-man wishes to look while operating the car.

In the form of our device which is paradapted for use on automobiles we pre er to install the device permanently in contact .with the glass and for this purpose we provide a rigid tubular arm 19 rising from the casing and provided at its upper end with means for securing it to the frame of a wind-shield. When the frame is metal as 20 Fig. -7- this securing means is a clamp comprising a plate 21 formed to fit the frame 20 and to receive the clamping bolt 22, the upper end of the arm 19 being formed to coperate with the plate 21 to clamp the device in position.

Where the wind-shield frame is of wood as 23, Fig. -6- the plate 21 and clamping bolt 22 are eliminated and the upper end of the tube 19, which is fiat, as shown, is `se cured directly to the frame by screws 24. In this form of our device the tube 19 serves as a conduit for the supply wires 10, In setting the heater upon a wind-shield it is not diilicult to form the free end 25 of the tube 19 so that the front face of the heater lies flat against the wind shield glass 26 in the best condition to most efficiently transmit theheat to the glass, and once the device has been installed, it remains permanently in position.

For permitting the lowering of the motor.- mans window without the necessity of placing the heater within the box 2, we provide a yielding support 27 secured to the bottom of the box 2 in the path of the arm 9. This support comprises two yielding or spring arms 28 secured together at one end and fastenedl to the box by screws 29. The body parts of the spring members 28 are formed to provide a free space 30 in which to receive the arm 9 when lthe casing 4 is in contact with the glass' 1. The free arms 28 of `the spring members are defiected'toward' each other at a point bevond the free space 30 'to form shoulders 31 upon which the arm 9 may rest and hold the easing 4 out of contact with the glass and suiiciently Iremoved therefrom to permit the lowering of the window. The free .ends 32 of the spring arms 28 are bent outwardly to form a flaring mouth to the space between the arms so that the arm can be easily forced between the arms thus spreading them apart a inst their own resiliency and permitting trance of the arm to the free space 30 between the arms. y

The spring 14 is not of suicient strength to force 'the arm 9 between the resilient' arms. 28 Ibut a slight additional force is necessary. Once, however, the arm 9 has passed into the free space 30 the casing 4 is held in contact with the glass by the spring 14,. and free of the yielding stop 27. I

iis

When the heater is in operation and an emergency should arise which requires the lowering of the motor-mans window, the motor-man simply ulls the heater away from the window sulciently to free the arm 9 from the yielding stop 27, and upon releasing the heater the arm 9 contacts with the outer end of the stop 27 and the heater is thus retained out of the path of the window.

We claim:l

1. In an electric heater for windows, an elongated metallic casing.A an electric heater within the casing, the casing having one fiat face for contact with a window, said fiat face having a tongue and groove connection with the casing so that it can be easily removed to give access to the interior of the casing.

2. In an electric heater for windows, an elongated metallic casing, an electric heater within the casing, the casinar having one iiatface for contact with a window, said flat face being uniformly perforated over its whole extent to permit direct radiation' therethrough in addition to lthe indirect radiation through the metal and said flat face being easily removable to give ready access to the interior of the casing.

3. In an electric yheater for windows, an`

elongated metallic casing, an electric heater within the casing, the casing having one fiat face for contact with a window, said Hat face being easily removable to give access to the interior of the casing, and means for holding the casing with its fiat face in contact with a window glass.

. 4. A window pane heater comprising a closed metallic casing having one fiat easily removable side for contact with a window pane, a heater within the casing, means for mounting the casing for movement from and toward awindow' pane; means for yieldingly holding the casing with its fiat side in contact with a window `pane and means for temporarily holding the casing out of contact with the window pane'a suicient distance to permit the frame in which pane is held to pass said Hat side.

5. window heater comprlsing a closed metallic casing, having a flat side for presentation to a window, an electric heater within the casing, a bent arm joined to the universal joint, and said arm mounted at its other end for swinging motion whereb the casing may be moved into contact wit the window for heating same and away from the window for storage, means for holding the casing in contact with the window ane with a yielding pressure, the universal Joint permitting the casing to lie fiat against the window pane regardless of any Slight lack of alinement.

7. A window heater comprising a closed metallic casing, having a fiat side for presentation to a window, an electric heater within the casing, a housing arranged near the window-pane, a bent arm mounted at one end within said housing and adapted to swing out of and into the housing, said casing mounted on the free end of the arm and adapted to be swung into contact with the glass and away from the window and into the housing, and yielding means for holding the arm at both limits of its move- WILLIAM c. BURMEISTER. EDWIN N. sMooK.

Witnesses:

EnwAnn Far WILSON, M. M. Bonn. 

